Harrow



(No Model.)

J. R. WHITTEMORE.-

HARROW.

Patented Apr. 14, 1885.

Witnesses;

Inveniar,

, UNITED STATES PATENT OFFICE.

JOHN R. WHITTEMOBE, OF OHIOOPEE FALLS, MASSACHUSETTS.

HARROW.

SPECIFICATION forming part of Letters Patent No. 315,579, dated April14,1885.

I Application filed January 4, 1883. (No model.)

To all whom it may concern:

Be it known that I, JOHN R. WHITTEMORE, of Ohicopee Falls, in the countyof Hampden and State of Massachusetts, have invented new and usefulImprovements in Harrows. of which the following is a specification,reference being had to the accompanying drawings, in which-like lettersof reference indicating like parts- Figure 1 is a top and Fig. 2 a sideview of my harrow. Figs. 3 and 4 illustrate the detail of construction.

My invention consists in the novel methods of connecting the tooth-beamwith the main beam or frame and in holding the tooth-beam in position.

a represents the main beam, to which the. tooth-beams are attached.

brepresents the tooth-beams; O, the drawframe; 6, the regulating-wheels;f, a flat metalic spring, and i an adjusting-piece.

The construction, will be readily under stood onreferring to thedrawings.

I am aware that harrows have heretofore been made having the tooth-beamssecured to the main beams with U -shaped springs.

These are expensive, and tend to make the device complicated.

I am also aware that in agrain-drill the furrow-share bar has heretoforebeen connected with the lever by a spring, as shown in Letters Patent N0. 35,713, and that a spring has been used in cultivators, planters, anddrills, to hold the tooth in the earth,as shown in Letters Patents Nos.106,039, 52,445, and 120,742.

I am also aware of Letters Patent No. 186,873, dated January 30,1877.The manner of application, however, in those several machines and theconstruction are not the same as shown and used by me,.and I make noclaim to the application or construction as therein shown.

I am aware that ina gang-plow the beams carrying the plows have beenattached to the carriage by hinges fixed to the upper faces of themeeting beams, and having springs with one end fixed to the upper andlower sides of the beams of the carriage, and the free ends reachingover and pressing upon the beams carrying the gang.

I am also aware that a connection has been made between a shaft and adrill-bar in a seedplant-er, consisting of a drag hook or chain fixed tothe shaft and extended to the end of the bar, and the shaft and barfurther 0on nected by a bent spring, and I make no claim to suchspecific constructions.

My improvements consist in abutting the rear face of the cross-beam andthe front end,

of the beam carrying the tooth with their upper faces on the samehorizontal line, and then securing these partsby a straight spring laidflat on their upper faces and secured as stated. I use a straightspring, and bolt the same to the top of the main beam and tooth-beam,the end of the tooth-beam being adapted to strike against the main beamwhen the toothbeam is in its normal position, thus preventing the toothbeing forced too far into the earth,without the use of any otherappliance; and this application of a simple straight spring does awaywith the necessity of ahinge as used in the machines above referred to.'I

secure a fiat spring, f, to the main beam and tooth-beams in the mannershown in Figs. 3

and 4. The spring thus acts both as a springand hinge.

The object of providing a spring-connection is to allow each tooth toautomatically relieve itself from obstructions without at fecting theoperation of the other teeth. The depth of drag is regulated byadjusting the wheels 6 as may be required byloosing the bolt spring laidflat on the. upper faces of said.

beams with one endrigidly secured to and across the draw-beam, and theother end extended and rigidly secured to the top face of r thetooth-beam, substantially as and for the purpose set forth.

Witnesses: I

ALLEN WEBSTER, L. P. BUNKER.

JOHNR. WHITTEMORE.

